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CCNA 200-301 Mock Exam Question and Answers [100% Correct] 2025/2026

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CCNA 200-301 Mock Exam Question and Answers [100% Correct] 2025/2026 What does the Maximum Transmission Unit (MTU) define? It specifies the largest Layer 3 packet size that can be transmitted over a network medium. How many bytes are allocated for the Frame Check Sequence (FCS) in an Ethe...

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  • November 19, 2024
  • 18
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers

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  • ccna 200 301 mock exam question and answers 100

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  • CCNA - Cisco Certified Network Associate
  • CCNA - Cisco Certified Network Associate

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CCNA 200-301 Mock Exam Question and
Answers [100% Correct] 2025/2026
What does the Maximum Transmission Unit (MTU) define?

It specifies the largest Layer 3 packet size that can be transmitted over a network medium.



How many bytes are allocated for the Frame Check Sequence (FCS) in an Ethernet frame, and what is its
purpose?

4 bytes - It helps the receiving NIC verify whether transmission errors occurred in the frame.



What is the combined size of an Ethernet header and trailer?

22 bytes for the header + 4 bytes for the trailer = 26 bytes total.



What role does the FCS serve in the Ethernet trailer?

It provides a mechanism for the receiver to compare results with the sender to check for errors in
the frame.



How does the FCS check for transmission errors in the Ethernet trailer?

The sender applies a mathematical algorithm to the frame before transmission and stores the
result in the FCS field. The receiver applies the same algorithm to the received frame. If the results differ,
an error is detected, and the frame is discarded.



What do WAN technologies primarily define?

They define the Layer 1 (physical) and Layer 2 (data link) protocols used to communicate over long
distances.



What type of duplex communication does a Leased Line link use?

Full-Duplex



Why are Leased Lines referred to as such?

1

, Because the telecommunications company does not own the line but instead leases it for a
monthly fee.



Which terms are used interchangeably with Leased Lines?

Leased Circuit, Circuit, Serial Line, Serial Link, Point-to-Point Link, WAN Link



What distinguishes a Private Line (WAN)?

It ensures that the data transmitted cannot be intercepted by other customers of the
telecommunications company, thus ensuring privacy.



What is the transmission speed of a T1 line?

1.544 Mbps



Where do telecommunications companies typically place their equipment?

In buildings known as Central Offices (COs).



Which layer of the OSI model do Leased Lines define?

Physical (Layer 1); various data-link protocols are developed to control and use Leased Lines.



What is the High-Level Data Link Control Protocol (HDLC)?

A synchronous, bit-oriented data link layer protocol used for Leased Lines. It is simpler than
Ethernet because frames only travel from one point to another, without the need for extensive
addressing.



What is the key difference between the HDLC header in ISO and Cisco standards?

The Cisco standard HDLC header includes a 'Type' field that helps routers determine which routing
protocol the frame carries.



Which HDLC field serves a similar purpose to the Preamble and SFD in an Ethernet frame?

Flag

2

, What is the purpose of the Flag field in an HDLC header?

It signals to the receiving node that a new frame is arriving by using a recognizable bit pattern.



What are the four fields found in the Cisco proprietary HDLC header in order?

Flag, Address, Control, and Type



Which field(s) are found in the HDLC trailer?

Frame Check Sequence (FCS)



What does Point of Presence (PoP) refer to?

A nearby service provider location that connects to the customer’s building.



What does EoMPLS stand for?

Ethernet over Multiprotocol Label Switching; a technology for providing Ethernet services to
customers.



How many bytes does the standard IP header consist of?

20 bytes



What are EXEC commands in a Cisco network?

Commands that can be executed in both User EXEC mode and Enable EXEC mode.



What is the default number of commands stored in the history buffer?

10 commands



Where is the running configuration file stored on a Cisco switch?

In RAM (Random Access Memory) or DRAM (Dynamic RAM).



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